Automatic boiler feed apparatus.



E. KERTING.

AUTOMATIC BOILER FEED APPARATUS'.

APPLICATION FILED Nov. 15, 1912.

1,1 33,040. Patented Mar. 23, 1915.

wrrNEssEs QM/2- INVENTOR zwf mn BYMQQLJI A TTORNE Y UNITED STATES PATENT oEEIcE.

ERNST KOERTING, F PEGLI, ITALY, ASSIGNOR T0 SCHUTTE & KOERTING COMPANY,

0F PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA.

AUTOMATIC .BOILER FEEID AIPARATUS.

Specification of Letters Patent.

Patented Mar. 23, 1915.

Application tiled November 15, 1912. Serial No. 731,472.

l tain new and useful Improvement in Automatic Boiler Feed Apparatus, of which the following 'is a true and exact description, reference being had to' the accompanying drawings, which form a part thereof.

The object of the present invention is to provide simple and effective means .forv

pumping liquid, and particularly hot liquid, against a considerable head, and my apparatus is especially adapted and devised for` automatically returning to a boiler the water of condensation drained out of the steam piping connected to the boiler, intermittently as such water accumulates. l

In carrying out my invention I connect an ordinary steam jet injector in yseries with an ordinary float pump of the automatic 'monte-jus type, in such manner that the Wavter discharge outlet of the fioatpump leads to the water inlet of the injector, and I employ the fioat of the Hoat pump to control the supply of steam `to the injector aswell as to the fioat pump,- steam being simultaneously supplied to or cut off from the iioat pump and injector as the float approaches first one and then the other of the two limits of its movement. Bv this combination of the float pump and injector I am able to deliver water of any temperature above the boiling point against a pressure higher than that of the boiler supplying steam to the steam jet and float pump, as the 'action of .the injector is added to that of the fioat .pump and the pressure under which the water ispdelivered to the injector makes it possible to feed water at the temperature of steam at that pressure, Moreover the apparatus is certain in its action. l

A further advantage of mv invention is found in the fact Athat no regzillatinglr means for proportioning the steam and water passing into the injector is necessarv. "since variationsin the steam pressure o f the boiler produce similar variations in 4pressure of both thewater and the steam passing into the injector, and in consequence the dimensions of a properly designed iniecto'r are suitable for allsteam pressures- The waste or overfiow outlet provided to make the injector 'self-starting, is preferably controlled by a non-return valve opening outwardly,

-which can be loaded as required by means of a weight or a spring to maintain suliicient pressure in the mixingchamber of the injector to enable the latter to work whenA the temperature of the water passing through 1t is above 212 F.

The various features of novelty which characterize 'my invention are pointed out with particularity in the claims annexed to and forming a part of thisspecification. For a better understanding of the invention, however, and of theadvanta es possessed by it, reference should be ha to the accompanyin drawings and descriptive matter in which my invention may be embodied.

The one figureof the drawing is a somewhat'diagrammatic sectional elevation of a preferred form of apparatus embodying my invention. 1

In drawings A represents the steam and water chamber of a float pump. This chamber is provided at its lower end with a water inlet controlled by the inwardly opening check valve B, and water outlet controlled by the outwardly opening check valve C.

The steam supply connection to the chamber .A comprises a steam supply pipe F1, connecting the boiler or other source of pressure Huid to the'inlet chamber E. of a valve casing E. Communication between the inlet chamber E and the outlet chamber E2 of the valve casing E is controlled by a valve D. The chamber E2 is connected to the up per end of the tank of the chamber A by the pipe F; Communication between the chambers E and E2 is controlled by a float actuated valve D. As shown, the valve D is directly engaged by a lever fulcrumed at G', and having a depending. rod H pivouilly vconnected to its free end. The rodH forms `a'guide for the float I which is free to move up and down on the rod between the collars H and H2, thus providing forquick open- 4ing and closing movements of the valve D as the liquid level in the chamber A approaches its upper and lower limits. Advantageously the body or stem of the valve D has connected to it a valve dislrD, opening and closing communication between the interior of the chamber A and a chamber E',

:formed in the valve casing E, as the valve D closes and opens respectively. This permits steam to escape freely from the chamhave illustrated forms in which "'ilflsnre in the mixing chamber of the injector,

ber A through the valve chamber Es when thevalve closes. The valve chamber E3 may be open to the atmosphere but preferably, as shown, is connected by the pipe K to the receptacle L in which the Water to be pumped accumulates. As shown, the valves D and D are connected by a piston-like en` largement D'' between the portions D and D `which works in a corresponding cylindrical portion of the valve casing E and is provided with peripheral grooves to prevent steam from leaking into the chamber E2, when the valve D is in its open position.

Preferably the valve disk D is partially balanced as by'means of the piston eXtension D3. This permits the valve ydisk D to be made of ample area, Without requiring an undesirably large loat I. The outer end of the chamber E4 of the valve casing E in which the piston D3 works is advantageously connected as by -thc pipe T to the receptacle L, so that steam leaking by the piston D3, and water of condensation formed therefrom, may be conveyed to the recep- 'tacle L.

The water inlet of the chamber A is connected to the reservoir L by a pipe M, and the Water outlet of the chamber A is connccted by a pipe N to the water inlet or suction port O of a steam injector O of ordinary construction. The steam inlet O2 of the injector O is connected to the chamber Il of valve casing `E by av pipe F2. The pressure outlet 03 of the injector O is connected to the delivery pipe P running to the boiler or other receiver for the water delivered by the pumping apparatus.

Q represents a check valve for preventing back flow through the pipe P.

The waste or overflow outlet O of the injector. provided to facilitate starting, is controlled b v an outwardly opening check valve R, which preferably is adjustably i", loaded, as by the weight S. to insure a pres- `fsuiiicient to enable Water at a temperature above 212 F. to be pumped.

.. i` The operation of the apparatus shown will be readily understood by those skilled in the art. lVhile the cha'mber A is filling with Water through the pipe M, the common steam supply valve D for the chamber A and injector O is closed. IVhen the chamber A fills to the predetermined extent the float I moves the valve D to its open position, thus permitting steam to pass into the injector and into the uppei` end of the chamber A. As the pressure builds up in the chamber A the outward How of water through the pipe N commences, the check valve C opening to permit this flow and the check valve B closing to prevent back flow through the pipe M. lVhen steam is lirst. turned into the injector and before the jet reaches its full velocity, the pressure builds up in the mixing chamber of the injector `andthe valve R opens to permit the water and steam to flow to waste for the brief interval required for the jet to rea'eh its full velocity and shift over to the discharge nozizle of the injector. As soon as this occurs the check lva1\'e Q in the delivery pipe P is forced open, and the pressure in the mixing chamber of the injector falls, permitting the check.

move the valve D to its seat, thus interrupt-V ing the supply of steam to the chamber A and also to the injector. The opening of the valve D occuring simultaneously with the closing of the valve D. permits the steam to exhaust from the chamber A. connected piping and injector O through the pipe K. As the pressure in the tank A is thus reduced,

Water again begins to flow from the receptacle L into the chamber A through the 'pipe M.

The apparatus is of special utility where employed for returning to a boiler water of condensation, such as drainage from steam traps connected to steam piping leading from the boiler; but it will be readily apparent that the apparatus is capable of use in many different ways.

Having now described my inventionnvhat I claim as new and desire to secure by Let-v ters Patent is,

1. In combination, a steam jet injector, a tloatpump comprising a closed chamber having a water inlet anda water outlet, the latter being connected to the Water inlet of the injector, and means responsive to the height of Water level in said chamber for establishing and cutting ofi' a steam supply to said injector and to said chamber as the Water level in said chamber rises and falls.

2. In combination. a steam jet injector, a float pump comprising a closed chamber having a water inlet and a water outlet, the latter being connected to the water inlet of the injector. a steam supply valve having an outlet chamber connected to the upper endof said closed chamber and to the steam inlet of said injector, and a float located within 'said chamber and operating said valve.

3. In combination, a steam jet injector, a.Y

' said chamber and to said injector, a partially balanced valve control-ling said connection the injector, and means responsive to the and means responsive to the height of water height of water level in said chamber for level in said chamber for actuating said controlling the supply of steam to the steam valve. inlet of said injector and to said chamber as 15 5 4. In combination, a steam jet injector, the water level in said chamber rises and having sstear inlet, awater irlet, al pes falls. sure out et, an an over ow out et, a oa e relief valve controlling said overflow outlet, ERNST KOERTING' a oat pump comprisln a closed chamber Witnesses:

10 having water inlet an a Water outlet, the A. H. LEWIS,

latter being connected to the water inlet of C. P. YENIAN. 

